package com.atguigu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.Value;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback") //没有配置
    //@SentinelResource(value = "fallback", fallback = "handlerFallback") //fallback只负责业务异常
    //@SentinelResource(value = "fallback", blockHandler = "blockHandler")  //blockHandler只负责sentinel控制台的配置违规
    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler", exceptionsToIgnore = {IllegalArgumentException.class})

    public CommonResult<Payment> fallback(@PathVariable("id") Long id) {
        CommonResult<Payment> result = restTemplate.
                getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);

        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException, 非法参数异常、、、");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException, 空指针异常、、、");
        }
        return result;
    }

    public CommonResult handlerFallback(Long id, Throwable e) {
        Payment payment = new Payment(id, null);
        return new CommonResult(444, "异常时兜底handleFallback,exception=" + e.getMessage(), payment);
    }

    public CommonResult blockHandler(Long id, BlockException e) {
        Payment payment = new Payment(id, null);
        return new CommonResult(55555, "流控时兜底blockHandler,请稍后再试", payment);
    }

    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }


}
